er.extensions.logging

Class ERXLogger

java.lang.Object

org.apache.log4j.Category

org.apache.log4j.Logger

er.extensions.logging.ERXLogger

All Implemented Interfaces:

org.apache.log4j.spi.AppenderAttachable

public class ERXLogger
extends org.apache.log4j.Logger

Custom subclass of Logger. The main reason for this class is to isolate the log4j dependency to only this class. This gives us the freedom in the future to switch logging systems and this should be the only effected class .. in theory.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	ERXLogger.Factory LoggerFactory subclass that creates ERXLogger objects instead of the default Logger classes.

Field Summary

Fields

Modifier and Type	Field and Description
static String	CONFIGURE_LOGGING_WITH_SYSTEM_PROPERTIES
static ERXLogger.Factory	factory
static org.apache.log4j.Logger	log logging supprt

Fields inherited from class org.apache.log4j.Category

additive, level, name, parent, repository, resourceBundle

Constructor Summary

Constructors

Constructor and Description
ERXLogger(String name) Default constructor.

Method Summary

Modifier and Type	Method and Description
static void	configureLogging(Properties properties) Sets up the logging system with the given configuration in Properties format.
static void	configureLoggingWithSystemProperties()
void	debugStackTrace(Throwable throwable) Dumps an Throwable's Stack trace on the appender if debugging is enabled.
static ERXLogger	getERXLogger(Class clazz) Creates a logger for a given class object.
static ERXLogger	getERXLogger(Class clazz, String subTopic) Creates a logger for the given class object plus a restricting subtopic.
static ERXLogger	getERXLogger(String name) Main entry point for getting an Logger for a given name.
static org.apache.log4j.Logger	getLogger(Class clazz)
static org.apache.log4j.Logger	getLogger(String name) Overrides method of superclass to return a logger using our custom Logger$Factory class.

Methods inherited from class org.apache.log4j.Logger

getLogger, getRootLogger

Methods inherited from class org.apache.log4j.Category

addAppender, assertLog, callAppenders, debug, debug, error, error, exists, fatal, fatal, forcedLog, getAdditivity, getAllAppenders, getAppender, getChainedPriority, getCurrentCategories, getDefaultHierarchy, getEffectiveLevel, getHierarchy, getInstance, getInstance, getLevel, getLoggerRepository, getName, getParent, getPriority, getResourceBundle, getResourceBundleString, getRoot, info, info, isAttached, isDebugEnabled, isEnabledFor, isInfoEnabled, l7dlog, l7dlog, log, log, log, removeAllAppenders, removeAppender, removeAppender, setAdditivity, setLevel, setPriority, setResourceBundle, shutdown, warn, warn

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

CONFIGURE_LOGGING_WITH_SYSTEM_PROPERTIES

public static final String CONFIGURE_LOGGING_WITH_SYSTEM_PROPERTIES

See Also:

Constant Field Values

log

public static org.apache.log4j.Logger log

logging supprt

factory

public static ERXLogger.Factory factory

Constructor Detail

ERXLogger

public ERXLogger(String name)

Default constructor. Constructs a logger for the given name.

Parameters:

name - of the logging logger

Method Detail

getERXLogger

public static ERXLogger getERXLogger(String name)

Main entry point for getting an Logger for a given name. Calls getLogger to return the instance of Logger from our custom Factory. Note that if the log4j system has not been setup correctly, meaning the LoggerFactory subclass has not been correctly put in place, then RuntimeException will be thrown.

Parameters:

name - to create the logger for

Returns:

Logger for the given name.

getLogger

public static org.apache.log4j.Logger getLogger(String name)

Overrides method of superclass to return a logger using our custom Logger$Factory class. This works identical to log4.Logger.getLogger

Parameters:

name - to create the logger for

Returns:

Logger for the given name.

getERXLogger

public static ERXLogger getERXLogger(Class clazz)

Creates a logger for a given class object. Gets a logger for the fully qualified class name of the given class.

Parameters:

clazz - Class object to create the logger for

Returns:

logger for the given class name

getLogger

public static org.apache.log4j.Logger getLogger(Class clazz)

getERXLogger

public static ERXLogger getERXLogger(Class clazz,
                                     String subTopic)

Creates a logger for the given class object plus a restricting subtopic. For instance if you had the class a.b.Foo and you wanted to create a logger for the subtopic 'utilities' for the class Foo then the created logging logger would have the path: a.b.Foo.utilities.

Parameters:

clazz - Class object to create the logger for

subTopic - to restrict the current logger to

Returns:

logger for the given class and subtopic

configureLoggingWithSystemProperties

public static void configureLoggingWithSystemProperties()

configureLogging

public static void configureLogging(Properties properties)

Sets up the logging system with the given configuration in Properties format.

Parameters:

properties - with the logging configuration

debugStackTrace

public void debugStackTrace(Throwable throwable)

Dumps an Throwable's Stack trace on the appender if debugging is enabled.

Parameters:

throwable - throwable to dump